200g/7oz raspberries, halved
200g/7oz condensed milk
4 cardamom pods
100驳/3陆辞锄 pistachios, roughly chopped
pinch of salt
2 tsp vanilla extract
400g/14oz custard cream biscuits
100驳/3陆辞锄 unsalted butter, plus extra for greasing
600ml/20fl oz double cream